Rich Felker
835f9f950e
this header evolved to facilitate the extremely lazy practice of omitting explicit includes of the necessary headers in individual stdio source files; not only was this sloppy, but it also increased build time. now, stdio_impl.h is only including the headers it needs for its own use; any further headers needed by source files are included directly where needed.
53 lines
930 B
C
53 lines
930 B
C
#include "stdio_impl.h"
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#include <wchar.h>
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#include <errno.h>
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wint_t __fgetwc_unlocked(FILE *f)
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{
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mbstate_t st = { 0 };
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wchar_t wc;
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int c;
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unsigned char b;
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size_t l;
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f->mode |= f->mode+1;
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/* Convert character from buffer if possible */
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if (f->rpos < f->rend) {
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l = mbrtowc(&wc, (void *)f->rpos, f->rend - f->rpos, &st);
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if (l+2 >= 2) {
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f->rpos += l + !l; /* l==0 means 1 byte, null */
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return wc;
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}
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if (l == -1) {
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f->rpos++;
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return WEOF;
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}
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} else l = -2;
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/* Convert character byte-by-byte */
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while (l == -2) {
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b = c = getc_unlocked(f);
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if (c < 0) {
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if (!mbsinit(&st)) errno = EILSEQ;
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return WEOF;
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}
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l = mbrtowc(&wc, (void *)&b, 1, &st);
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if (l == -1) return WEOF;
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}
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return wc;
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}
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wint_t fgetwc(FILE *f)
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{
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wint_t c;
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FLOCK(f);
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c = __fgetwc_unlocked(f);
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FUNLOCK(f);
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return c;
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}
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weak_alias(__fgetwc_unlocked, fgetwc_unlocked);
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weak_alias(__fgetwc_unlocked, getwc_unlocked);
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